Ckeditor 5 License: Key

CKEditor 5 operates under a dual-license model , meaning you generally need a license key for commercial use or to access premium features. While open-source projects can use it under the

license without a paid key, most business applications require a commercial license to comply with legal terms and remove "Powered by CKEditor" watermarks. Types of License Keys

Depending on your project's stage, you may use different types of keys available through the CKEditor Ecosystem dashboard Trial License Key : Valid for , granting full access to all features for evaluation. Development License Key

: For non-production environments like localhost or testing servers. It doesn't consume "editor loads" but may show a development banner. Production License Key

: For active end-user environments. Depending on your plan, this may be based on usage (editor loads). : For open-source projects, you can use the string licenseKey

in the configuration to acknowledge the open-source license. How to Obtain and Use a Key : Sign up for a plan or a 14-day free trial Access Dashboard : Log in to the Customer Portal and navigate to the License Keys Configure the Editor

: Add the key directly to your editor's initialization code: javascript ClassicEditor .create( document.querySelector( ), licenseKey: '' // Replace with your actual key or 'GPL' plugins: [ /* ... plugins ... */ ], toolbar: [ /* ... toolbar items ... */ ] ) .then( editor => console.log( 'Editor initialized' , editor ); ) . ( error => console.error( error ); ); Use code with caution. Copied to clipboard Commercial vs. Open Source Commercial Plans ckeditor 5 license key

: Required if your project is not open-source. Options include a Free commercial plan

(limited to 1,000 loads/month via CDN) or paid subscription plans for self-hosting and premium features. LTS Edition

: The Long Term Support edition is available only under commercial terms and provides up to three years of security updates. Open Source : If your project is GPL-compatible, you can use CKEditor 5 for free, but you must still set the licenseKey in newer versions (v44.0.0+) to avoid warnings. Are you setting this up for a personal open-source project company's production environment CKEditor Licensing

The Complete Guide to CKEditor 5 License Keys: What You Need to Know

If you are building a modern web application, chances are you’ve integrated CKEditor 5. It is arguably the most powerful rich-text editor on the market, offering a modular architecture and a "What You See Is What You Get" (WYSIWYG) experience that feels like Google Docs or Microsoft Word.

However, as you move from development to production, you’ll encounter the requirement for a CKEditor 5 license key. Understanding how these keys work, whether you actually need one, and how to implement them is crucial for a smooth launch. CKEditor 5 operates under a dual-license model ,

CKEditor 5 is a popular, open-source WYSIWYG text editor that offers a wide range of features for rich text editing. When it comes to using CKEditor 5 in a commercial project or for specific use cases that might require additional permissions or support, understanding the licensing is crucial.

How to Get a License Key (If You Need One)

  1. Visit the CKEditor 5 Pricing page.
  2. Choose a plan (e.g., Developer, Team, Enterprise, or Collaboration).
  3. Complete the purchase.
  4. Retrieve the key from your dashboard.

You can also request a free 14-day trial key to test premium features.

Final Thoughts

The CKEditor 5 license key is simple to implement once you understand your use case. For most open-source or non-commercial projects, you won’t need one at all. For commercial applications, especially those leveraging advanced collaboration or export features, a license is both legally required and technically beneficial (support, updates, stability).

Get your license key → CKEditor Customer Dashboard

Have questions about which license fits your project? Leave a comment or check the official CKEditor forums.

Method 3: React / Angular / Vue Integration

For React:

<CKEditor
  editor=ClassicEditor
  config= licenseKey: 'your-license-key-here' 
  data="<p>Hello world!</p>"
/>

For Angular:

this.editorConfig = 
  licenseKey: 'your-license-key-here',
  // ...
;

Q3: What happens if my license expires?

Premium features stop working. The editor will fall back to a read-only mode or display a licensing notification depending on the version. Your users will see an error.

Error 3: "Domain not allowed"

Message: License key is not valid for this domain.

Cause: Your license key was registered for app.mycompany.com, but you are trying to use it on test.mycompany.com or localhost. Fix:

  • Add the new domain to your license in the CKEditor Ecosystem account.
  • For local development, add localhost and 127.0.0.1 to your allowed domains.

What Happens If You Don’t Provide a License Key (When Needed)?

  • Open-source projects – Nothing. Everything works as expected under GPL.
  • Commercial projects (without key) – The editor will still load but:
    • A console warning appears: CKEditorError: license-key-missing
    • Premium features will not initialize.
    • You are technically violating the license terms (could lead to legal action from CKSource).

Scenario B: You are using a Commercial License

If you are building a proprietary application (SaaS, internal corporate tool, or commercial product) and cannot open-source your code, you must purchase a commercial license.

This is when you need a license key.

Recently, CKEditor 5 introduced a mechanism to validate commercial licenses. If you have purchased a license, you must configure the config.licenseKey property in your editor initialization.